BMW’s next-gen luxury saloon promises radical weight loss, and a high-performance M7 version is planned too
6 August 2014

Testing of the sixth-generation BMW 7-series is at an advanced stage ahead of the car’s debut at the Frankfurt motor show in September next year before going on sale in 2016. 

Key among the goals for the new 7-series is a significant weight reduction via the use of a combination of aluminium, magnesium, high-strength steel and carbonfibre-reinforced plastic (CFRP), the latter of which is set to be used not only for the bonnet and roof but also in load-bearing areas in the floorpan and body.

Speaking about the new car recently, BMW boss Norbert Reithofer said: “It will set a new standard in its class in terms of weight saving.”

Engineers say processes developed for the i3 and i8 have been adopted on the new BMW flagship in a bid to shed up to 200kg over its predecessor. This should ensure that the successor to the lightest of today’s 7-series models, the 740i, tips the scales at around 1650kg, or less than the existing 535i.

Prototypes seen testing reveal that the new 7-series retains similar dimensions to those of the current model, launched in 2008. As with its predecessor, the luxury saloon will be built in standard and long-wheelbase guises, but plans also exist for an extra-long-wheelbase model.

Underpinning the new car is a modular platform that forms part of a longitudinal engine matrix that is already used by the 3 and 4-series and is set to be adopted by replacements for the 5 and 6-series.

The light but rigid structure is allied to an aluminium-intensive suspension system that uses double wishbones up front and a multi-link rear set-up at the rear together with a new generation of air springs and road-scanning technology. That's in combination with stereo cameras, with the package aimed at giving the new BMW greater levels of ride comfort and better refinement than before. 

The new model will be offered with a range of turbocharged four, six, eight and 12-cylinder petrol and diesel engines, a standard nine-speed automatic transmission and the option of rear or four-wheel drive. 

The petrol engines are based around a new modular architecture with a 500cc individual cylinder capacity. A heavily updated version of today’s 3.0-litre, in-line six-cylinder engine is planned, along with a new 4.0-litre V8 and a 6.0-litre V12, the latter two set for use by Rolls-Royce.

Diesels will include a 2.0-litre four in a new entry-level model and 3.0-litre in-line six, the latter of which will appear in three states of tune and both twin and triple-turbocharged forms.   

To further boost the model’s presence in the luxury performance market, BMW is looking at creating a new M7 or M750i M Performance version, likely to receive a heavily tuned version of the M5’s twin-turbo 4.4-litre V8 producing more than 600bhp.

Also planned from the off is a plug-in petrol-electric hybrid, the exact make-up of which is still to be decided. 

The Future Luxury concept seen at the Beijing show provided the first hints not only of BMW’s new design language but also its in-car technology, which will rely heavily on speech recognition in a move aimed at reducing the number of controls and lessen dependency on the rotary iDrive controller.

Among the key rivals for BMW's 7-series will be the new Audi A8, which has also been spotted testing.

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Our Verdict

Technology-laden BMW 7-series looks better than its predecessors, but is ultimately disappointing

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Comments
8

7 August 2014
It's only Autocar's interpretation of what the car MIGHT look like, not the actual car. Of course it will probably be conservatively styled. That's what people who are actually buying this type of car want (as opposed to most commentators here who are simply dreaming). Far more important is the story that the car will be much lighter than before, which can only be a good thing so far as performance and efficiency is concerned.

7 August 2014
That is the worst interpretation I have seen from Autocar.

8 August 2014
2 litre diesel for the 7? The World really is changing! And about time BMW started slicing some serious fat off its big cars. They've been getting way too porky of late.

7 August 2014
I wasn't sure how impressive a 1,650 kg kerb weight for the lightest next 7-Series is, so I did a little research. Currently from lightest to heaviest: Jaguar XJ 2.0 i4 Ti (1,660 kg) - Audi A8 3.0 TFSI (1,830 kg) - Maserati Quattroporte S (1,860 kg) - BMW 740i (1,900 kg) - Lexus LS 460 (1,940 kg) - Mercedes-Benz S400 (1,945 kg) - Volkswagen Phaeton 3.0 V6 (2,188 kg). The trouble is Jaguar, Audi and Lexus are replacing their range-toppers soon, too, and the first two especially are way ahead in lightweight technology. If anyone's going to crack the 1,600 kg mark first it'll be them.

7 August 2014
It is not just about aluminium. BMW has deep expertise when it comes to applying CFRP. Hence they enjoy a huge advantage over Audi and Jaguar in that department.

9 August 2014
BMW better make sure that the next generation is good looking. They already have a famous marque and the 7 already drives well enough....afterall by far the majority of buyers will not be professional drivers and will therefore be satisfied. Great to see the research and quest to shed weight. However the car must be good looking. I keep on stressing this. The F10, 5 series looks great, however the 5 Gran Turismo is ugly. We really don't want another ugly car when it can easily be a avoided. I am flabbergasted as to how ugly Toyota have managed to make the 4 Runner. Likewise their Highlander. I just hope BMW do not get lost in themselves and produce a monstrosity!

Velocity is poetry in motion. Steve Johnson.

9 August 2014
If this still largely steel car is as light as even the existing XJ or A8 I'll eat my hat! No car in this luxury category has EVER lost weight compared to its predecessor, not even the Jag or Audi.

10 August 2014
I will always prefer A BMW with 6 & supercharger or twin Turbo including the V12 never a 4 cylinder. I hate 4 cylinders. The M7 will finally come with twin turbo 8. I will buy that car.

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